“Conversational search has started rolling out on Google.com in the latest version of Chrome,” a Google spokeswoman confirmed in an email. “You can just click the mic in the search box, ask your question in a natural way, and get spoken answers.”

What’s missing still is “hotwording,” the ability to speak phrase like “ok google” that tells the search engine to process the spoken words that follow as a query. That’s expected later this year.

But the absence of hotwording doesn’t detract from the utility of conversational search, which allows users to pose natural language queries, within limits.

Traditional Google Search works by identifying keywords in documents and returning links to the most relevant documents. Conversational search adds an understanding of semantics, through Google’s Knowledge Graph. It allows you, for example, to pose a query like “Who is the President of the United States,” to receive the answer “Barack Obama” (on a Card that’s separate from the results list) and then to follow-up with a query like “How old is he?”

Google’s conversational search system associates the pronoun “he” with the subject of your last query. Such smarts, while still short of sci-fi AI, make it much easier to communicate with Google.

For example, if you wanted to know what the weather will be like around Lake Tahoe this weekend, you might type “lake tahoe weather,” which would return a Google Card graphic with the current weather and the expected temperatures for the next few days. Or you might type “lake tahoe weather this weekend,” which would return the traditional search results list, requiring further interaction.

But using conversational search, you could speak into your mobile phone or into the microphone in your desktop computer, activated via Chrome, and ask, “Will it be sunny in Lake Tahoe this weekend?”

Google will speak the answer back: “No don’t expect sunshine in Lake Tahoe. The forecast is 63 degrees and partly cloudy.” And whether you typed that query or spoke it, Google will present its Card graphic with Saturday’s forecast highlighted — Google understood “weekend” in your query and translated that into Saturday.

It’s not immediately clear when other desktop and mobile Web browsers will be able to trigger users’ microphones so their computers can capture spoken Google queries. It depends upon how and when they enable the Web Speech API. Apple’s next version of Safari, likely to be discussed at its developer conference next month, might add speech API support. The Aurora version of Firefox began supporting microphone streams in January, as part of the WebRTC specification. However, Firefox 21, the present release version, does not present the microphone icon (used to trigger speech input) in the Google.com search box. A Mozilla representative did not immediately respond to a request for comment.